OS X Accessibility: Make checkboxes etc. checkable with VoiceOver

NSAccessibility has no explicit analog for
QAccessibleActionInterface::toggleAction(), checking checkboxes/radio
buttons is handled by NSAccessibilityPressAction. So ensure exposing
the action properly on OS X so that VoiceOver users can check/uncheck
checkboxes, select radio buttons etc.

Change-Id: I54b47515cc4882ecf0544c7351bd3c9046023a44
Task-number: QTBUG-44852
Reviewed-by: Jan Arve Sæther <jan-arve.saether@theqtcompany.com>

1 files changed, 7 insertions, 3 deletions

diff --git a/src/plugins/platforms/cocoa/qcocoaaccessibility.mm b/src/plugins/platforms/cocoa/qcocoaaccessibility.mm
index a42c877fc6..e13a9c2b19 100644
--- a/src/plugins/platforms/cocoa/qcocoaaccessibility.mm
+++ b/src/plugins/platforms/cocoa/qcocoaaccessibility.mm
@@ -282,6 +282,8 @@ NSString *getTranslatedAction(const QString &qtAction)
         return NSAccessibilityShowMenuAction;
     else if (qtAction == QAccessibleActionInterface::setFocusAction()) // Not 100% sure on this one
         return NSAccessibilityRaiseAction;
+    else if (qtAction == QAccessibleActionInterface::toggleAction())
+        return NSAccessibilityPressAction;
 
     // Not translated:
     //
@@ -303,11 +305,13 @@ NSString *getTranslatedAction(const QString &qtAction)
     Translates between a Mac action constant and a QAccessibleActionInterface action
     Returns an empty QString if there is no Qt predefined equivalent.
 */
-QString translateAction(NSString *nsAction)
+QString translateAction(NSString *nsAction, QAccessibleInterface *interface)
 {
-    if ([nsAction compare: NSAccessibilityPressAction] == NSOrderedSame)
+    if ([nsAction compare: NSAccessibilityPressAction] == NSOrderedSame) {
+        if (interface->role() == QAccessible::CheckBox || interface->role() == QAccessible::RadioButton)
+            return QAccessibleActionInterface::toggleAction();
         return QAccessibleActionInterface::pressAction();
-    else if ([nsAction compare: NSAccessibilityIncrementAction] == NSOrderedSame)
+    } else if ([nsAction compare: NSAccessibilityIncrementAction] == NSOrderedSame)
         return QAccessibleActionInterface::increaseAction();
     else if ([nsAction compare: NSAccessibilityDecrementAction] == NSOrderedSame)
         return QAccessibleActionInterface::decreaseAction();